Yes, agroforestry can be used in rice-producing areas. Typically, rice is grown in lowlying areas with high rainfall, but the upland farming of rice in countries of South East Asia, such as Myanmar, is very important to those communities. The challenges facing rice production in Southeast Asia caused by climate change, require consideration of how trees can help reduce the risks faced by farmers.
By growing trees the rainfall is increased, and when a rice crop is washed away the trees remain as another source of produce. Trees endure long droughts much better than even irrigated rice, they improve the soil and fertilize the rice.